I think the penetration would be a bigger concern than expansion

ya are not inventing anything new here upside down hollow base wadcutters have been around for ever and never recommended for any game that I ever read about except for maybe rats or the occasional test varmit. They were and are used by some for self defense loads where its a whole different game than cloeanly harvesting critters.

Full diameter 45 slugs work fine for pigs n hogs at 1000 fps or so and are a proven thing. This I feel is hype and gimmick at best.

JK's Airgun Forums, moderators, and administrators are not responsible for any problems that may occur from reading or using content posted on this forum, as they are the exclusive responsibility of two parties: the person who posted it and the person who acted on said posted information.Use of our forums by people under 18 years old is allowed only with legal guardian(s) present.